Lu Zizhou transmigrates into the useless prince of the declining Great Yuan dynasty and discovers that his nation's fortune has taken physical form as a “fortune koi,” a fish that is always hungry. Other nations have golden dragons and fierce tigers, but his fish is as thin as a loach and is always begging for food. When the crown prince of a powerful nation tries to seize his fief, Lu Zizhou uses his “hungry fish” skill to swallow a wisp of the other nation's fortune. His koi burps, and a timely rain falls over the dynasty! From then on, he takes this hungry fish, “useless at everything but eating,” on a comeback journey of swindling and cheating (crossed out), building alliances and stripping the great powers of their national fortune. But when the will of an ancient, sleeping kingdom awakens and the truth about the continent is revealed, Lu Zizhou discovers that what he has been raising isn't a koi at all, but...
